Home / 258,721.20-388,081.80-109,130.40

Finding the Fourth Proportional to 258,721.20, 388,081.80 and 109,130.40

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Solution

The fourth proportional to 258,721.20, 388,081.80 and 109,130.40 is: 163,695.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,721.20 : 388,081.80 = 109,130.40 : x
  2. Step 2: Convert to fraction form
    258,721.20/388,081.80 = 109,130.40/x
  3. Step 3: Cross multiply
    258,721.20x = 388,081.80 × 109,130.40
  4. Step 4: Simplify right side
    258,721.20x = 42,351,522,066.72
  5. Step 5: Solve for x
    x = 42,351,522,066.72/258,721.20
  6. Step 6: Final answer
    x = 163,695.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.